<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登陆</title>
</head>
<body>
     <center>
          <form action="/OnlineChat/Login">
          <h2 style="color:blue">请登录</h2> 
                  用户名：<input name="username" ><br/>
          <input type="submit" value="登陆"> 
          <input type="reset" value="取消">    
         </form>
     </center>
</body>
</html>